Night Owl Chatterboxes - Part XXXIX!
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in the end is it ok for teeth????Originally posted by fudgester:Vinegar = ethanoic acid.
Calcium carbonate + ethanoic acid = calcium ethanoate + carbon dioxide + water.
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Household vinegar is just 4% ethanoic acid... which is already a pretty weak organic acid to begin.Originally posted by kopiosatu:in the end is it ok for teeth????
So ultimately, its dissolving action on your teeth is negligible even if you were to gargle with it... though I doubt you would want to do that. -
so did u go to the sinseh that i told u abt??Originally posted by the Bear:looks like it's too late to go to the chinese sinseh
but heck.. i'm getting better
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nope.. my usual one..
good enough.. but then, hey.. i'm getting better by the day
anyway, thought vinegar was acetic acid or are they the same? -
how can i feel sleepy now?
maybe first day back at work took a lot out of me -
Acetic acid is simply another name for ethanoic acid:
http://en.wikipedia.org/wiki/Acetic_acid
In other news, I've been skimming through a research paper that my prof gave me as a reference for my FYP.
Basket... I can barely comprehend 10% of whatever gobblygoodook the author's talking about.
Things aren't looking good for me. -
that's good then..Originally posted by the Bear:nope.. my usual one..
good enough.. but then, hey.. i'm getting better by the day
anyway, thought vinegar was acetic acid or are they the same?
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i thought so..
i was doing chemistry during the time where they started to change the names of all the acids and bases...
like what we called Ammonium Hydroxide was changed to Ammonia Solution in between Sec 3 and 4.. got us all mixed up until the teacher said to stick with what we already learnt...Originally posted by fudgester:Acetic acid is simply another name for ethanoic acid:
http://en.wikipedia.org/wiki/Acetic_acid
In other news, I've been skimming through a research paper that my prof gave me as a reference for my FYP.
Basket... I can barely comprehend 10% of whatever gobblygoodook the author's talking about.
Things aren't looking good for me. -
you'll know more eventually, keep reading and follow the trail of referencesOriginally posted by fudgester:Acetic acid is simply another name for ethanoic acid:
http://en.wikipedia.org/wiki/Acetic_acid
In other news, I've been skimming through a research paper that my prof gave me as a reference for my FYP.
Basket... I can barely comprehend 10% of whatever gobblygoodook the author's talking about.
Things aren't looking good for me. 
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Please refresh my memory: you're FYP pertains to the mixing of liquids in a pipe, right? Or am I thinking of someone else?Originally posted by fudgester:In other news, I've been skimming through a research paper that my prof gave me as a reference for my FYP.
Basket... I can barely comprehend 10% of whatever gobblygoodook the author's talking about.
Things aren't looking good for me. -
The problem stems from the scientists' mistaken belief that ammonia dissociates easily into water to form ammonium hydroxide (NH4OH), considering that it seemed to dissolve readily into water.Originally posted by the Bear:i thought so..
i was doing chemistry during the time where they started to change the names of all the acids and bases...
like what we called Ammonium Hydroxide was changed to Ammonia Solution in between Sec 3 and 4.. got us all mixed up until the teacher said to stick with what we already learnt...
They only realised later on that the degree of dissociation is actually miniscule and that the reason why ammonia dissolves readily in water is because of the strong hydrogen bonds formed between the ammonia and water molecules. So it would actually be more correct to say that aqueous ammonia solution has a formula of NH3.H2O.
Anyway, I got confused as well... in my time, quite a few references still referred to aqueous ammonia as 'ammonium hydroxide' and used the old erroneous chemical formula. -
hmmz i never got that although my time was b4 yours. guess i never looked up referencesOriginally posted by fudgester:The problem stems from the scientists' mistaken belief that ammonia dissociates easily into water to form ammonium hydroxide (NH4OH), considering that it seemed to dissolve readily into water.
They only realised later on that the degree of dissociation is actually miniscule and that the reason why ammonia dissolves readily in water is because of the strong hydrogen bonds formed between the ammonia and water molecules. So it would actually be more correct to say that aqueous ammonia solution has a formula of NH3.H2O.
Anyway, I got confused as well... in my time, quite a few references still referred to aqueous ammonia as 'ammonium hydroxide' and used the old erroneous chemical formula. -
all i know now is ammonia = smelly as heck
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smelly salt?Originally posted by the Bear:all i know now is ammonia = smelly as heck -
we used it to wake up classmates who fell asleep during chem lessonOriginally posted by Lin Yu:smelly salt? -
something like that.. "smelling salts"
also known as "horse piss"Originally posted by Lin Yu:smelly salt? -
i once had ammonia poisoning.
i actually went to sniff up ammonia, and the damn smell stuck in my nose for 2 full days.
kept washing my nostrills with water but the damn smell won't go away. -
that's not ammonia poisoning.. you can actually die from it...
that's why people who go explore caves where bats live have to use respirators, filters and whatever gas mask thingies...Originally posted by stellazio:i once had ammonia poisoning.
i actually went to sniff up ammonia, and the damn smell stuck in my nose for 2 full days.
kept washing my nostrills with water but the damn smell won't go away. -
will someone tell me what is "superiorous" ?
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a new word.Originally posted by kopiosatu:will someone tell me what is "superiorous" ? -
Evening
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yo sbst.
how come this morning the nel must wait for 6mins for the train during peak period? -
i bet the talking bus is now slowly recovering from hyperventilating with rage for the heresy perpetrated by the rival bus company (which isn't really)
in the meantime... i need to go lie down for a while to rest my back -
i need help, can anyone help me find websites to teach u how to tie a gift?
i've got a ribbon but i don't know how to tie. -
Take care of your back, the bear.
I need to go shampoo my hair.